catcht ext phrase while in a call and play a prirecorded wav

I would Like it to runn on Iphone blackberry, android , windows 7 phones. The listen text program I want to run on all platforms. What I need it to do is either place a call and lister for a prhrase and when the phrase is sopken like "entre Test" it would reply "ok enter text now" and iyou will speak into it and it will play back a *.wav file that corrisponds to you r prhase. I have someone working on the iphone and andrwid phone and I need more done